Dick, if you want an in-depth perspective on how divisive the issues of the role of Ellen White in Adventism was during the 60s and 70s, and are willing to read a 456 page book read:
Valentine, Gilbert M., Ostriches & Canaries: Coping With Change in Adventism, 1966 to 1979.
If you want a much shorter treatment, and from a slightly different focus see:
Campbell, Michael W., 1919, The Untold story of Adventism's Struggle With Fundamentalism, 124 pages.
Campbell, Michael w., 1922, The Rise of Adventist Fundamentalism, 144 pages.
NOTE: All three books may be purchased from Amazon.